420731332 has 24 divisors (see below), whose sum is σ = 843163776. Its totient is φ = 179948928.

The previous prime is 420731309. The next prime is 420731401. The reversal of 420731332 is 233137024.

It is a junction number, because it is equal to n+sod(n) for n = 420731297 and 420731306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 853 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (35131824).

Almost surely, 2^420731332 is an apocalyptic number.

It is an amenable number.

420731332 is an abundant number, since it is smaller than the sum of its proper divisors (422432444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420731332 is a wasteful number, since it uses less digits than its factorization.

420731332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30387 (or 30385 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 420731332 is about 20511.7364452647. The cubic root of 420731332 is about 749.3216574683.

Adding to 420731332 its reverse (233137024), we get a palindrome (653868356).

The spelling of 420731332 in words is "four hundred twenty million, seven hundred thirty-one thousand, three hundred thirty-two".